La1-XSrXCoO3 Perovskite: Antimicrobial Properties and PVDF Based Piezoelectric Nanogenerator for Energy Storage Through Self-Induced Polling

Author

S M. Anyet Ullah Shohag, The University of Texas Rio Grande Valley

Date of Award

8-1-2024

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Chemistry

First Advisor

M Jasim Uddin

Second Advisor

Javier Macossay-Torres

Third Advisor

Manar Shoshani

Abstract

Piezoelectric Nanogenerators (PENGs), which can produce electrical energy from mechanical energy via ferroelectric effect, are one of the ambient sources of green energy. PENGs have gathered a huge attention due to cost-effectiveness, mechanical stability, and easy installation process. In this experiment, different weight percent of Sr2+ doped Lanthanum Cobaltite (La1- XSrXCoO3) perovskite, a ferroelectric material, was synthesizes by using a simple combination of sol-gel and molten-salt process and then characterization by X-ray diffraction, and scanning electron microscopy ensures the uniform morphology of nano cubes. Poly (vinylidene difluoride) (PVDF), N,N-dimethylformamide and acetone solution were used to make a flexible film using nanoparticles through sonication followed by magnetic stirring, spin coating, self-induced polling process and curing. Fourier transform infrared spectroscopy (FTIR) investigation ensures that selfinduced polling process was effective to identify the structural β phase. The incorporation of MWCNT increased the β-phase of the composite film to 39.92%. LaCoO3/PVDF/MWCNT composite film is then placed in between two copper sheets to fabricate the piezoelectric nanogenerator. The optimum concentration of pristine LSCO was determined to be 7.5 weight percent; with just 12 BPM (0.2 Hz) at 1.9224J potential energy input, the resultant PENG produced an electrical output of around 25.713 V, 40.3 nA, and 15.919mW/m2. The inclusion of Strontium (Sr) dopant in the composition further increased the electrical output to 25.899 V, 391 nA, and 47.149mW/m2. While using a bridge rectifier the voltage was found ~8.2V for 7.5wt% of 5% LSCO/PVDF composite film which was further improved to 25.2V when MWCNT are introduced, and two cells are arranged in a series. At 105BPM, the PENGs could charge a 3.3 μF capacitor to 1.14 V in about 75 seconds. Finally, the PENG was used as a green energy harvesting device, smart weight sensor and motion sensor to operate low-power electronic devices.

Comments

Copyright 2024 S. M. Anyet Ullah Shohag. https://proquest.com/docview/3116041384

Recommended Citation

Shohag, S M. Anyet Ullah, "La1-XSrXCoO3 Perovskite: Antimicrobial Properties and PVDF Based Piezoelectric Nanogenerator for Energy Storage Through Self-Induced Polling" (2024). Theses and Dissertations. 1551.
https://scholarworks.utrgv.edu/etd/1551